Y. E. Ovchinnikov, Y. Struchkov, M. Buzin
1997
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Journal
Polymer science. Series A, Chemistry, physics
Abstract
The structure of triclinic and orthorhombic crystals of hexaphenylcyclotrisiloxane was studied by X-ray diffraction. The unit cell parameters are as follows: triclinic, a = 12.89 A, , b = 15.060 A, c = 16.549 A, a = 83,98°, β = 84.06°, γ = 77.91°; orthorhombic, a = 10.123, b = 15.802 A, c = 20.245, A comparison of the two crystal structures with that of poly(diphenylsiloxane) showed that a topotaxic polymerization may, in principle, occur in thc most closely packed rows of molecules in the [121] direction of a triclinic hexaphenylcyclotrisiloxane crystal.